The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 09, 1989
Filed:
Nov. 24, 1987
Masanobu Nakamura, Kamakura, JP;
Mitsui & Co., Ltd., Tokyo, JP;
Kokan Kako Co., Ltd., Yokohama, JP;
Abstract
A method and an apparatus for manufacturing cam shafts in which cam members are held in respective rotatable axially aligned rings by holding members connected within the rotatable rings so that a pipe member cam be inserted through respective aligned holes of the cam members. The rings are individually rotatable so as to rotate the cam members by respetive predetermined angles. After a pipe member is inserted in the holes of the individually rotated cam members, a bulging process device seals respective opposite ends of the pipe member and forces a pressurized fluid into the pipe so as to bulge the pipe to fix the pipe in the respective holes, thereby to form the cam shaft.